This bug has been known about for some time but I can't understand why it wasn't tackled in the last balance patch. It concerns Facet of Nature: while upkeeping F2, if you switch legends and then consume Facet of Nature your character will be subject to Herald's facet upkeep animation under your character's feet and it won't go away unless you map or log. Mounting will not erase the animation.
This is so annoying to me because I also hate Herald's facet upkeep animation; I think it's incredibly lazy design and can be done better. I think you could cover the character with different parts of a translucent dragon, emulating Glint, depending on what facet's are active. For example, Facet of Darkness could portray a translucent-blue draconic helm superimposed over the characters head while Facet of Elements could superimpose elements revolving around the character's hands. Just an idea that I think would be visually more appealing than the current circle we have.